Scanner calibration robust to lamp warm-up

Details Scanner calibration robust to lamp warm-up Scanner calibration robust to lamp warm-up

2011-05-03

2011-05-03

Bui, Bryan (Department: 2857)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Reexamination Certificate

active

07937235

ABSTRACT:
Systems and methods are described that facilitate calibrating a scanner by capturing a plurality of white calibration files and generating a mathematical function that models the scanner. For instance, a white calibration file can be captured before and after a page is scanned, and the function can be an average of offset and gain values for pixels in scanlines of the scanned page. Three or more white calibration files can be used to generate a linear function (e.g., using linear regression) or an exponential function describing the gain an offset values of the pixels.

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patent: 2005/0185227 (2005-08-01), Thompson
patent: 2007/0045548 (2007-03-01), Kiser
patent: 2007/0103734 (2007-05-01), Angal et al.

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